LXR linux/arch/arm/include/asm/smp

   1/*
   2 * ARM specific SMP header, this contains our implementation
   3 * details.
   4 */
   5#ifndef __ASMARM_SMP_PLAT_H
   6#define __ASMARM_SMP_PLAT_H
   7
   8#include <asm/cputype.h>
   9
  10/*
  11 * Return true if we are running on a SMP platform
  12 */
  13static inline bool is_smp(void)
  14{
  15#ifndef CONFIG_SMP
  16        return false;
  17#elif defined(CONFIG_SMP_ON_UP)
  18        extern unsigned int smp_on_up;
  19        return !!smp_on_up;
  20#else
  21        return true;
  22#endif
  23}
  24
  25/* all SMP configurations have the extended CPUID registers */
  26static inline int tlb_ops_need_broadcast(void)
  27{
  28        if (!is_smp())
  29                return 0;
  30
  31        return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 2;
  32}
  33
  34#if !defined(CONFIG_SMP) || __LINUX_ARM_ARCH__ >= 7
  35#define cache_ops_need_broadcast()      0
  36#else
  37static inline int cache_ops_need_broadcast(void)
  38{
  39        if (!is_smp())
  40                return 0;
  41
  42        return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 1;
  43}
  44#endif
  45
  46/*
  47 * Logical CPU mapping.
  48 */
  49extern int __cpu_logical_map[];
  50#define cpu_logical_map(cpu)    __cpu_logical_map[cpu]
  51
  52#endif
  53